crannell



(No Model.) 2 Sheets-Sheet 1.. G. W. GRANNELL.

- DRENGHING BIT.

N0. 4.02.068. Patented Apr. 2s, 1 889.

q wwmowy the arms 0 at a suitable distance from their upper ends, andhas its ends provided with for dental treatment; and it consists in thesame. Fig. 4 is a detail view of the adjust- UNITED STATES PATENT()FFICEQ CHARLES W. CRANNELL, OF OBERLTN, KANSAS, ASSIGNOR OF ONE-HALFTO TULLY SCOTT, OF SAME PLACE.

NG-BIT.

SPECIFICATION forming part of Letters Patent No. 402,068, dated April23, 1889.

Application filed November 27, 1888.

T0 aZZ whom, it may concern:

Be it known that I, CHARL S W. CRANNELL, a citizen of the'United States,residing at Oberlin, in the county of Decatur and State of Kansas, haveinvented new and useful Improvements in Devices for Expanding the Mouthsof Horses, of which the following is a specification.

My invention relates to improvements in devices for expanding themouths'of horses peculiar construction and combination of devices, thatwill be more fully set forth hereinafter, and particularly pointed outin the claims.

In the drawings, Figure 1 is a perspective View of a mouth-expanderembodying my improvement, showing the position of the same when arrangedin a horses mouth. Fig. 2 is a sectional View of the same removed fromthe horse. Fig. 3 is a side elevation of the able bar. the loops. I

A represents a substantially U -shaped frame, which comprises the archedupper portion, B, and the vertical side arms, 0. The latter arecylindrical in shape for a suitable distance from their lower ends andare provided on their outer sides with ratchetteeth D.

E represents across-bar, which connects Fig. 5 is a detail view of oneof threaded extensions, which pass through openings in the said arms,and to the outer ends of said threaded extensions are screwedclamping-nuts F. r

G represents an adjustable bar, which is provided near its ends withopenings, through which the arms 0 extend, and the ends of the said barare extended outward and downward to form arms H. The said arms areprovided near their upper ends with ears I, between which are pivoteddetents K, that engage the ratchet-teeth and are maintained normally inengagement therewith by fiat springs -L, said springs bearing betweenthe extended arms M of the detents and the arms H of bar G. Swiveled onthe ends of the bar G are links Serial No. 291,988. (No model.)

N, which have their lower ends forked or bifurcated and provided withanti-friction rollers O.

To the lower ends of the arms C are secured outwardly-projectingspindles P by means of eyes formed at the inner ends of said spindlesand engaging reduced extensions of the arms 0 and clamping-nuts R,screwed to the said extensions and bearing under the inner ends of thespindles. Swiv- 6o eled on the said spindles at their inner ends areloops S, and pivoted 011 the said spindles are a pair of eccentriccam-levers, T, which pass between the bifurcated lower arms of the linksN and bear upon the rollers O, journaled in said links. The outer endsof the cam-levers are connected by a curved yoke, U, which has its endsswiveled to the said cam-levers.

V represents a pair of loops, which are piv- 7o oted to the arms 0 .neartheir upper ends. The links S and V are connected together in pairs bystraps a, on which are rings 6, and attached to the said rings is a headstall or strap, 0, which is adapted to pass over a '7 5 horses headbehind his ears, and is provided with a buckle, (l, by means of whichits length may be adjusted. I

The operation of my invention is as follows: The bar G is normallyraised to a position in proximity to the bar E by disengaging thedetents from the ratchet-teeth and raising the cam-levers, and said barsE and G are inserted in the horses mouth in a manner similar to a bit,with the yoke or arched portion of the frame over the horses upper jaw.The head stall or strap is then buckled around the horses head, asbefore described, to secure the device in position in his month. Bygrasping the yoke U and depressing the same. the cam-levers are causedto lower the bar G, and thereby expand the horses jaws .to any desiredextent, the spring-pressed declosing his jaws will cause the bar G tomove upward toward the bar E, as will be readily understood.

Having thus described my invention, I claim 1. The combination of theframe having the rigid bar E, the adjustable bar G, movable on theframe, the detents to lock the same to the frame, and the cam-levers T,PlXOtGd to the frame and connected to the bar G to operate the latter,substantially as described.

2. The combination of the frame A,having the cross-bar E and the arms C,with ratchetteeth D, the bar G, movable on the arms 0 and having thedetents to engage the ratchetteeth, the links swiveled to the bar G, andthe cam-levers T, pivoted at the lower ends of arms 0 and engaging thelinks, substantially as described.

3. The combination of the frame having the cross-bar E and the arms 0,the cross-bar G, movable vertically on said arms, the links swiveled tothe cross-bar, the cam-levers pivoted to the lower ends of arms 0 andoperating in the links, and the yoke U, connecting the free ends of thecam-levers, substantially as described.

4. In a mouth-expander, the frame A,- having the arched portion B topass across the horses nose, and having the side arms, C, and thecross-bar E, to enter the horses mouth, combined with the adjusting-barG, sliding on the arms C, and also adapted to enter the horses mouth,the detents carried by the sliding bar G to engage the side arms, andthe mechanism, substantially as described, to lower the bar G, as setforth.

5. In a mouth-expander, the frame A, having the arched portion to passover the horses nose, and the rigid bar E, to enter the mouth of thehorse, combined with the bar G, sliding on the frame A, and alsoentering the horses mouth, the yoke 0, bearing under the jaw of thehorse, and connecting devices between the yoke U and the bar G to raiseand lower said bar G, and the detents for said bar G, as set forth. V

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

CHARLES \V. CRANNELL.

Witnesses:

C. F. RATHBONE, G. G. RATHBONE.

